Chromospheres of Luminous Cool Stars

Publisher: Cambridge University Press

E-ISSN: 1743-9221|11|A29B|447-449

ISSN: 1743-9213

Source: Proceedings of the International Astronomical Union, Vol.11, Iss.A29B, 2016-10, pp. : 447-449

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Abstract

Direct ultraviolet imaging and spectroscopy of Alpha Orionis (Betelgeuse) reveals variable chromospheric structures and mass motions. Spectroscopy also demonstrates the changes of wind opacity, speeds, and mass loss in luminous stars. Cool stars have complex chromospheres that need to be considered in construction of stellar atmospheric models and subsequent spectral analyses.